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Computational Assessment of the Microstructure-Dependent Thermomechanical Behaviour of AlSi12CuNiMg-T7—Methods and Microstructure-Based Finite Element Analyses

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Advances in Mechanics of High-Temperature Materials

Part of the book series: Advanced Structured Materials ((STRUCTMAT,volume 117))

Abstract

In this paper, the influence of the microstructure of a cast aluminium alloy used for pistons in combustion engines on the local and global deformation behavior is investigated by means of microstructure-based cell models and the finite element method. Therefore, a representative microstructure is digitized using nano computer tomography. In the digitized and segmented data, the aluminium matrix, silicon particles, pores and two intermetallic phases are distinguished. Microstructure-based cell models are created and linear-elastic, thermal and viscoplastic material properties are assigned for the finite element simulation in ABAQUS/Standard. The elastic, macroscopic nearly isotropic material behavior is shown for 64 different microstructure-based cell models with 200 \(\times \) 200 \(\times \) 200 elements with microstructure-dependent material properties at room temperature. A microstructure cell is subjected to a thermal cycle with zero macroscopic loading in order to examine the influence of the thermal mismatch between the individual microstructure phases on the resulting stresses and strains on the micro level. High stresses at interfaces of silicon particles and the aluminium matrix occur in the linear-elastic simulation, whereas an elastic-viscoplastic material behavior of the aluminium matrix leads to a overall stress relief in the microstructure cell.

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Acknowledgements

The authors from the Fraunhofer Institute for Mechanics of Materials IWM would like to thank Simon Zabler from the project group NanoCT Systeme at the Fraunhofer Institute for Integrated Circuits IIS in Würzburg and Maximilian Ullherr from the University of Würzburg for the digitization of the microstructure volume and the segmentation of the respective data.

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Authors and Affiliations

  1. Fraunhofer Institute for Mechanics of Materials IWM Freiburg, Freiburg im Breisgau, Germany

    Carl Fischer, Axel Reichenbacher, Mario Metzger & Christoph Schweizer

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  1. Carl Fischer
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  2. Axel Reichenbacher
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  3. Mario Metzger
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  4. Christoph Schweizer
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Correspondence to Carl Fischer .

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Editors and Affiliations

  1. Institut für Mechanik, Otto-von-Guericke-Universität Magdeburg, Magdeburg, Sachsen-Anhalt, Germany

    Konstantin Naumenko

  2. Institut für Energie- und Klimaforschung, Forschungszentrum Jülich GmbH, Jülich, Nordrhein-Westfalen, Germany

    Manja Krüger

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Fischer, C., Reichenbacher, A., Metzger, M., Schweizer, C. (2020). Computational Assessment of the Microstructure-Dependent Thermomechanical Behaviour of AlSi12CuNiMg-T7—Methods and Microstructure-Based Finite Element Analyses. In: Naumenko, K., Krüger, M. (eds) Advances in Mechanics of High-Temperature Materials. Advanced Structured Materials, vol 117. Springer, Cham. https://doi.org/10.1007/978-3-030-23869-8_2

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  • DOI: https://doi.org/10.1007/978-3-030-23869-8_2

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  • Publisher Name: Springer, Cham

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  • Online ISBN: 978-3-030-23869-8

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